9 boys and 10 girls together can complete a project in 6 days while 10 boys and 6 girls together can complete a project in 7 days. Then, in how many days 4 boys can complete the same project?
1
\(26\frac{5}{6}\)
2
\(26\frac{1}{6}\)
3
\(24\frac{3}{5}\)
4
\(25\frac{2}{6}\)